Own account, and unionised.
Most drivers look at the bottom line EG: the pay, when if you’re going to be doing the job for a number of years you should also look at the benefits an employer offers.
Like holiday pay based on you’re average earnings, hourly pay, not some ponzi bonus scheme, pension, staff discounts and bonuses all training and licences paid for sensible hours, it may take a number of years to find the work you like, the best jobs are never advertised its all about who you know.
The only downside with lots of own account work is having to work with and share vehicles with the most idle dirty and incompetent “drivers” you will ever come across.